ci: bump codecov/codecov-action from 3.1.5 to 4.0.1 (HumanSignal#5426)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.5 to 4.0.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.1.5...v4.0.1)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/tests.yml

@@ -94,7 +94,7 @@ jobs:
           poetry run pytest --cov=. --cov-report=xml -vv -n auto
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3.1.5
+        uses: codecov/codecov-action@v4.0.1
         with:
           fail_ci_if_error: true
           files: ./label_studio/coverage.xml
@@ -216,7 +216,7 @@ jobs:
           poetry run pytest --cov=. --cov-report=xml -vv -n auto
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3.1.5
+        uses: codecov/codecov-action@v4.0.1
         with:
           fail_ci_if_error: true
           files: ./label_studio/coverage.xml